Bumping along at 30k-ish daily is I believe about the level Sage (for media Prof Hunter and Prof Hayward) have said to expect ongoing (similar to endemic flu)
30k a day is over 10million a year, which at 20% detection rates which ONS says covid gets is over 50 million a year, which is not flu, the estimates for flu (no-one obviously really knows as we don't test like covid) is 10-20% of population getting flu every year, which would be an average of 6k per day equivalent to the covid number (reality is of course completely different in normal times the flu comes in a wave with large peaks of infection in a few weeks)
I don't really understand why people think it's surprising cases aren't going up, we've had too many cases that unless the vaccine is worthless, there simply aren't the people to be infected in huge numbers.